diff --git a/TIASshot/Utils/ImageStats.cs b/TIASshot/Utils/ImageStats.cs
index 52b8bae..f98d4b7 100644
--- a/TIASshot/Utils/ImageStats.cs
+++ b/TIASshot/Utils/ImageStats.cs
@@ -194,6 +194,12 @@
             foreach (var c in s) {
                 if (c == '"') sb.Append("\\\"");
                 else if (c == '\\') sb.Append("\\\\");
+                else if (c == '\n') sb.Append("\\n");
+                else if (c == '\r') sb.Append("\\r");
+                else if (c == '\t') sb.Append("\\t");
+                else if (c == '\b') sb.Append("\\b");
+                else if (c == '\f') sb.Append("\\f");
+                else if (c < 0x20) sb.Append("\\u").Append(((int)c).ToString("x4"));  // RFC 8259 §7: 制御文字は必ずエスケープ
                 else sb.Append(c);
             }
             sb.Append('"');